COLEOPTERA OF SOUTHWESTERN PENNSYLVANIA. 319 



Pennsylvania, though there are probably few localities where so 

 many are concentrated. The higher mountainous regions will doubt- 

 lessly furnish some very interesting things descending from the very 

 far northern fauna, and while few of the larger forms are likely to 

 add to this list, close collecting of small species will, without doul)t, 

 greatly extend it ; the valuable collection notes furnished by P. 

 Jerome Schmitt in connection with the Scydmsenidie and Pselaphida; 

 show this, and will be appreciated by students of these families. 



In this list seventy-two families are represented ; of the other ten 

 some species of Stylopidse, though as yet undetected, certainly occur, 

 while the remaining nine contain each but one genus, and altogether 

 but eighteen species. 



The total number of species is 2153, of which 58 are some unde- 

 termined and a few undescribed, and in addition there are -id varie- 

 ties belonging to sj)ecies in the catalogue. 



Whoever has occasion to compare this catalogue with that of 

 Europe, entitled : " Catalogus Coleopterorum Europaj, Caucasi et 

 Armenise rossicte," 1891 (Cat. No. iv), will find several of the spe- 

 cies common to both countries under different genex'ic names. This 

 is sometimes occasioned by a division of a more comprehensive genus, 

 the new genus being used in one catalogue and not in the other. 

 Again, the compilers of this European catalogue seem to have in 

 pai-t adopted an extreme rule of priority by which corrections in 

 orthography or etymology, made even by an author himself are 

 disregarded, and in case of synonyms, according to this scheme, the 

 first name in order of time, however inappropriate, must stand, even 

 when the publications are synchronous (perhaps on the same page) 

 the first name must have precedence. But inasmuch as the law of 

 common sense seems much more ancient than this construction of 

 the law of priority, only the emended names have been admitted to 

 this list. Finally, Geotfroy's superannuated genera have been instated 

 in this European catalogue, but not admitted in this list for the rea- 

 sons given by Dr. LeConte in the " Canadian Entomologist," vi, 

 188, etc. 



In the subjoined list of discrepancies the first name is that used 



in this catalogue ; the following that in the Euroi^ean. 



Bembidium Latreil. (emend) — Bembidion Latrell. 



Plochionus Dej. (emexi(l)~PlodonHs Dej. 



Tachys nanus — Tachi/td, a division of Tacliys. 



Silpha surinamensis — Asbolm ] , j^, , , , ^^ 



„., , , . r. 7 ,. . f both untenable (Horn . 



Silpha \a,pponica.—Psendopeltata ) 



TBANS. AM. ENT. SOC. XXII. OCTOBER, 1895. 



